GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Sep 2018, 01:11

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

M17-15

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49276
M17-15  [#permalink]

Show Tags

New post 16 Sep 2014, 01:01
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

95% (00:21) correct 5% (00:15) wrong based on 375 sessions

HideShow timer Statistics

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49276
Re M17-15  [#permalink]

Show Tags

New post 16 Sep 2014, 01:01
Manager
Manager
avatar
B
Joined: 16 Jul 2017
Posts: 59
Location: United Kingdom
GMAT 1: 660 Q47 V34
GPA: 3.87
Re: M17-15  [#permalink]

Show Tags

New post 07 Nov 2017, 12:19
Break 42 * 36 down into prime numbers --> 42 * 36 = (7)(3)(2) * (3)(3)(2)(2) or (7^1)(3^3)(2^3)
Now we need to check the answers to see if there are any prime factorisations that don't match up with the above.

A. 12 = (3)(2)(2) -- this is OK
B. 18 = (3)(3)(2) -- this is OK
C. 21 = (7)(3) -- this is OK
D. 28 = (7)(2)(2) -- this is OK
E. 49 = (7)(7) -- not OK! The original prime factorisation only has one 7, therefore this is NOT a divisor!
Director
Director
User avatar
G
Joined: 04 Sep 2015
Posts: 521
Location: India
WE: Information Technology (Computer Software)
CAT Tests
Re: M17-15  [#permalink]

Show Tags

New post 21 Aug 2018, 09:58
Which of the following is not a divisor of
42∗36
42∗36
?

A. 12
B. 18
C. 21
D. 28
E. 49


simply do hit and trial, whichever is not dividing the above number completely,should be the answer.
in our case 49 does not divide the above numbers completely. So E is the answer
Re: M17-15 &nbs [#permalink] 21 Aug 2018, 09:58
Display posts from previous: Sort by

M17-15

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Bunuel

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.